Power, Control & Instrumentation Cables - Tai Sin

Schedule of Installation Methods of Cables
(Including Reference Method)
Schedule of Installation Methods of Cables (including Reference Method) Technical Table 1.1
Installation Method
Description
OPEN AND CLIPPED DIRECT :
Examples
Appropriate Reference Method for
Determining Current-Carrying Capacity
Sheathed cables clipped direct to or Method 1
lying on a non-metallic surface
CABLES EMBEDDED DIRECT IN BUILDING MATERIALS :
Sheathed cables embedded directly Method 1
in masonry, brickwork, concrete, plaster
or the like (other than thermally
insulating materials)
IN CONDUIT :
Single core non-sheathed cables Method 3
in metallic or non-metallic conduit
on a wall or ceiling
†Single core non-sheathed cables Method 4
in metallic or non-metallic conduit
in a thermally insulating wall
or above a thermally insulating
ceiling, the conduit being
in contact with a thermally
conductive surface on one side
Multi core cables having Method 3
non-metallic sheath,
in metallic or non-metallic
conduit on a wall or ceiling
†The wall is assumed to consist of an outer weatherproof skin, thermal insulation and an inner skin of plasterboard or wood-like material having a
coefficient of heat transfer not less that 10 W/m 2 K. The conduit is fixed so as to be close to, but not necessarily touching, the inner skin. Heat from
the cables is assumed to escape through the inner skin only.
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